import java.util.*;

public class Java_100_nock {
    public static void main(String[] args) {

        int N = 0;
        Scanner sc = new Scanner(System.in);
        String line;
        line = sc.nextLine();
        String s[];
        int flg = 0;
        if(line.matches("^[0-9]$"))N = Integer.parseInt(line);
        if(1<=N&&N<=Math.pow(10,5)){
            int data[][] = new int[N][3];
            for(int i=0;i<N;i++){
                line = sc.nextLine();
                s = line.split(" ");
                data[i][0] = Integer.parseInt(s[0]);
                data[i][1] = Integer.parseInt(s[1]);
                data[i][2] = Integer.parseInt(s[2]);
                if(((0<=data[i][0]&&0<=data[i][0]&&0<=data[i][0])&&(data[i][0]<=Math.pow(10,4)&&data[i][1]<=Math.pow(10,4)&&data[i][2]<=Math.pow(10,4)))!=true)flg=1;
                
            }
            
            for(int i=0;i<N;i++){
                if(flg!=1)break;
                for(int x=0;x<N;x++){
                    if((data[i][0]==data[x][0])&&(data[i][1]==data[x][1])&&(data[i][1]==data[x][1])){
                        flg=1;
                        break;
                    }
                }
            }
            
            if(flg!=1){
                int f = 0;
                for(int i=0;i<N;i++){
                    for(int x=0;x<N;x++){
                        if(i==x)continue;
                        if(data[i][0]<data[x][0]&&data[i][1]<=data[x][1]&&data[i][2]<=data[x][2]){
                            f = 1;
                            break;
                        }else if(data[i][0]<=data[x][0]&&data[i][1]<data[x][1]&&data[i][2]<=data[x][2]){
                            f = 1;
                            break;
                        }else if(data[i][0]<=data[x][0]&&data[i][1]<=data[x][1]&&data[i][2]<data[x][2]){
                            f = 1;
                            break;
                        }
                    }
                    if(f!=1)System.out.println(i+1);
                    f = 0;
                }
                
            }
            
        }
    }
    
}